Convert the equation x^2+y^2-4x=0 to polar form. Then solve the resulting equation for r

Andrea went to the store to buy sweater that was on sale for 40% off the original price it was then put on clearance an additional 25% off the sale price she also use a coupon that saved her an additional five dollars and j did not spend more than $7.60 for the sweater what are the possible values for the original price of the sweater?

Need on this geometry question. explain how you did it.

Write as a product of two polynomials. 2(3–b)+5(b–3)^2